@misc{breakSite,
   author = {Dan Troyka},
   year = {2000},
   howpublished = "\url{http://brainking.com/en/GameRules?tp=84}"
}

@misc{tut1,
   title = {Tutorial sobre bibliografias em Prolog},
   howpublished = "\url{http://en.wikibooks.org/wiki/LaTeX/Bibliography_Management}"
}

@misc{tut2,
   title = {Tutorial de Prolog},
   howpublished = "\url{http://hilltop.bradley.edu/~chris/prolog.html}"
}

@misc{refman,
   title = {Reference Manual de SWI-Prolog},
   howpublished = "\url{http://www.swi-prolog.org/pldoc/refman/}"
}

@misc{sicstus,
   title = {SICStus Prolog Website},
   howpublished = "\url{http://www.sics.se/isl/sicstuswww/site/index.html}"
}

@misc{listings,
   title = {LaTeX/Packages/Listings},
   howpublished = "\url{http://en.wikibooks.org/wiki/LaTeX/Packages/Listings}"
}


% ver formatacoes em http://en.wikibooks.org/wiki/LaTeX/Bibliography_Management ou http://en.wikipedia.org/wiki/BibTeX ou noutro site